Spool valve for fluid control

Details Spool valve for fluid control Spool valve for fluid control

1999-01-28

2000-08-01

Michalsky, Gerald A.

Fluid handling

Systems

Programmer or timer

91480, 13762537, 13762538, 13762548, 13762567, 13762568, 251251, 251325, F16K 1114, F16K 324

Patent

active

060951923

ABSTRACT:
A spool valve is provided with a stem portion that defines a fluid passageway formed by either (a) a single central support having a non-cylindrical curved surface shaped hydrodynamically, or (b) only a pair of sidewalls with, preferably, interior surfaces that are also shaped hydrodynamically. These stem passageways, which are designed to facilitate the flow of high-speed/high-pressure fluids controlled by the valve, are maintained in a predetermined orientation relative to the ports of the valve cylinders by a mechanism preferably including (a) a cam-following roller supported in a tang fixed to each spool and (b) a two-element cam that captures the roller within two of the parallel sides of a cam-track groove formed on the respective interior surfaces of each cam element.

REFERENCES:
patent: Re33455 (1990-11-01), Hayashi et al.
patent: 2550011 (1951-04-01), Kohler et al.
patent: 3092085 (1963-06-01), Bataille
patent: 4748898 (1988-06-01), Hayashi et al.
patent: 4916901 (1990-04-01), Hayashi et al.
patent: 5038634 (1991-08-01), Matsuto et al.
patent: 5094147 (1992-03-01), Shaw
patent: 5109754 (1992-05-01), Shaw
patent: 5513553 (1996-05-01), Gleasman et al.
patent: 5554009 (1996-09-01), Ohta et al.

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